Short Answers Section 7.4 More Complex Stack Applications

Implement the following function. You may use the stack template class and the stack operations of push, pop, peek, is_empty, and size. You may also use cin.peek( ) and use "cin>>i" to read an integer.

 int evaluate_postfix_from_cin( ) // Precondition (Which is not checked): The next input line of cin is a // properly formed postfix expression consisting of integers, // the binary operations + and -, and spaces. // Postcondition: The function has read the next input line (including // the newline) and returned the value of the postfix expression. { int i; stack s;